Site-controlled formation of InAs/GaAs quantum-dot-in-nanowires for single photon emitters

J. Tatebayashi, Y. Ota, S. Ishida, M. Nishioka, S. Iwamoto, Y. Arakawa

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

We report the demonstration of site-controlled InAs/GaAs quantum dots (QDs) embedded in GaAs nanowires (NWs) by selective metalorganic chemical vapor deposition. InAs/GaAs quantum-dot-in-nanowires (QD-in-NWs) with various InAs thicknesses are realized on patterned GaAs(111)B substrates in the form of InAs/GaAs heterostructures and identified by structural analyses using scanning transmission electron microscopy and photoluminescence characterization. Sharp excitonic emission peaks at 10 K from single QD-in-NWs with the narrowest exciton linewidth of 87 μeV are observed. Light emission from the single QD-in-NW shows photon antibunching, along with biexciton-exciton cascaded emission process, which evidences single photon emission from high-quality QD-in-NWs.

Original languageEnglish
Article number263101
JournalApplied Physics Letters
Volume100
Issue number26
DOIs
Publication statusPublished - 2012 Jun 25
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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